# Arch Layout Calculator vs Theiox

The clearest difference is price: Theiox at Free against Arch Layout Calculator's $0.99. Theiox also leads on update cadence (every 3 weeks vs every 38 months) and iOS requirement (15.0 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

Theiox is free to download; Arch Layout Calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Arch Layout Calculator ships an update every 38 months, Theiox every 3 weeks. The most recent releases landed on October 8, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Arch Layout Calculator | Theiox |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 3 weeks** |
| Size | 1 MB | 57 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [H3Apps LLC](https://appshunter.io/developer/598620927) | [Elmeasure India Pvt Ltd](https://appshunter.io/developer/1254835470) |

## What reviewers say

### Arch Layout Calculator

[App page](https://appshunter.io/ios/app/arch-layout-calculator/id1630831077)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Theiox

[App page](https://appshunter.io/ios/app/theiox/id6476873263)

**In-app purchases:** none


## Frequently asked questions

### Is Arch Layout Calculator free?

Arch Layout Calculator costs $0.99, with no in-app purchases.

### Is Theiox free?

Theiox is free to download, with no in-app purchases.

### Do Arch Layout Calculator or Theiox have ads?

Neither Arch Layout Calculator nor Theiox shows ads.

### Which is updated more often, Arch Layout Calculator or Theiox?

Arch Layout Calculator ships an update every 38 months, and Theiox every 3 weeks. Most recently, Arch Layout Calculator was updated on October 8, 2026 and Theiox on October 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*